Question
Tina, Tommy and Ethan have a total of 192 pens. Tina and Ethan have a total of 115 pens while Tommy and Ethan have a total of 158 pens. How many more pens does Ethan have than Tina?
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Tina, Tommy and Ethan have a total of 192 pens. Tina and Ethan have a total of 115 pens while Tommy and Ethan have a total of 158 pens. How many more pens does Ethan have than Tina?